Radiation

Convection This is the transfer of _________ energy through the

movement of ______________ themselves. ____________ moves from ______________ areas to cooler areas.

 Liquids and ____________ can transfer heat by

______________ because the _______________ can move around unlike the particles in a solid.

  particles heat gases particles energy hotter

convection

RadiationHeat can move by travelling as Infra Red waves

These are electromagnetic waves, like light waves, but with a longer wavelength

An example is the sun:

The sun emits energy through electromagnetic waves

These come in contact with your skin

You can feel your skin getting warmer as energy is absorbed.

RadiationElectromagnetic waves act very much like

light waves:

They can travel through a vacuumThey travel at 300,000,000 m/sThey can be reflectedThey can’t travel through opaque materials.

RadiationWhen infra- red radiation falls on an object,

some will be reflected and some will be absorbed.

An object with a shiny or light surfacewill be a good reflector of infra-red radiation.

An object with a  dark surface will be a good absorber of infra-red radiation.

Radiation

Which outfit would be best for a match played during the day when the weather is hot and sunny? Why?

Which would be the best cup for keeping your tea warm? Why?

Why are houses in Andalucia usually painted white?

Why are fuel storage tanks like these usually silver/white in colour?

SummaryDescribe what is going on and how each

method of heat transfer works in this example:

Radiation This is the transfer of heat energy by __________.

Radiated heat can travel through a ____________, an empty space with no particles in it.

 This is why an ice cream will melt in the sun. vacuum waves.